     $(function () {
        var STATICURL = 'http://o9gzet7tk.bkt.clouddn.com/img/';
            var pullrefresh = {
                init: function () {
                    var pos = {};
                    var status = false;
                    var divobj = null;
                    var contentobj = null;
                    var reloadflag = false;
                    $('body').on('touchstart', function (e) {
                        e = mygetnativeevent(e);
                        pos.startx = e.touches[0].pageX;
                        pos.starty = e.touches[0].pageY;
                    })
                    .on('touchmove', function (e) {
                        e = mygetnativeevent(e);
                        pos.curposx = e.touches[0].pageX;
                        pos.curposy = e.touches[0].pageY;
                        if (pos.curposy - pos.starty < 0 && !status) {
                            return;
                        }
                        if (!status && $(window).scrollTop() <= 0) {
                            status = true;
                            divobj = document.createElement('div');
                            divobj = $(divobj);
                            divobj.css({ 'position': 'relative', 'margin-left': '-85px' });
                            $('body').prepend(divobj);
                            contentobj = document.createElement('div');
                            contentobj = $(contentobj);
                            contentobj.css({ 'position': 'absolute', 'height': '30px', 'top': '-30px', 'left': '50%' });
                            contentobj.html('<img src="' + STATICURL + 'icon_arrow.gif" style="vertical-align:middle;margin-right:5px;-moz-transform:rotate(180deg);-webkit-transform:rotate(180deg);-o-transform:rotate(180deg);transform:rotate(180deg);"><span id="refreshtxt">下拉可以刷新</span>');
                            contentobj.find('img').css({ '-webkit-transition': 'all 0.5s ease-in-out' });
                            divobj.prepend(contentobj);
                            pos.topx = pos.curposx;
                            pos.topy = pos.curposy;
                        }
                        if (!status) {
                            return;
                        }
                        if (status == true) {
                            var pullheight = pos.curposy - pos.topy;
                            if (pullheight >= 0 && pullheight < 150) {
                                divobj.css({ 'height': pullheight / 2 + 'px' });
                                contentobj.css({ 'top': (-30 + pullheight / 2) + 'px' });
                                if (reloadflag) {
                                    contentobj.find('img').css({ '-webkit-transform': 'rotate(180deg)', '-moz-transform': 'rotate(180deg)', '-o-transform': 'rotate(180deg)', 'transform': 'rotate(180deg)' });
                                    contentobj.find('#refreshtxt').html('下拉可以刷新');
                                }
                                reloadflag = false;
                            } else if (pullheight >= 150) {
                                divobj.css({ 'height': pullheight / 2 + 'px' });
                                contentobj.css({ 'top': (-30 + pullheight / 2) + 'px' });
                                if (!reloadflag) {
                                    contentobj.find('img').css({ '-webkit-transform': 'rotate(360deg)', '-moz-transform': 'rotate(360deg)', '-o-transform': 'rotate(360deg)', 'transform': 'rotate(360deg)' });
                                    contentobj.find('#refreshtxt').html('松开可以刷新');
                                }
                                reloadflag = true;
                            }
                        }
                        e.preventDefault();
                    })
                    .on('touchend', function (e) {
                        if (status == true) {
                            if (reloadflag) {
                                contentobj.html('<img src="' + STATICURL + 'icon_load.gif" style="vertical-align:middle;margin-right:5px;">正在加载...');
                                contentobj.animate({ 'top': (-30 + 75) + 'px' }, 618, 'linear');
                                divobj.animate({ 'height': '75px' }, 618, 'linear', function () {
                                    window.location.reload();
                                });
                                return;
                            }
                        }
                        if (divobj != null) {
                            divobj.remove();
                        }
                        divobj = null;
                        status = false;
                        pos = {};
                    });
                }
            };

            function mygetnativeevent(event) {

                while (event && typeof event.originalEvent !== "undefined") {
                    event = event.originalEvent;
                }
                return event;
            }
            pullrefresh.init();
        });
